| 摘要 |
PURPOSE:To normally perform the display of an operation by a second flash simultaneously in addition to the prenotice of the lifetime of a battery without adding anything to an electric circuit in an analog type watch. CONSTITUTION:Poles 6a, 6b of a stator for a main rotor 12 which drives a wheel train 15 of a watch are formed on a main magnetic flux path 18. Poles 7a, 7b of a stator for a subrotor 13 which drives a gear 16 with a battery lifetime display are formed on a submagnetic flux path 19 displaced from the main path 18, and the minimum starting voltage of the rotor 13 is increased larger than that of the main rotor 12. While the voltage of the battery is sufficient, magnetic flux capable of driving the rotor 13 passes through the path 19, but when the voltage of the battery is lowered to the vicinity of its lifetime, the rotor 13 no longer operates. As a result, the gear 16 which is driven by the rotor B so that its operation can be seen from a window hole 17 stops rotating, and the end of the lifetime of the battery can be notified. |
